Denis Oconnell
There are approximately 2 people named Denis Oconnell living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 171,377,169 Americans.
This estimate combines SSA birth records for the first name Denis with Census Bureau frequency data for the surname Oconnell. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
2
1 in 171,377,169
Named Denis
15K
Alive today
Named Oconnell
40K
Alive today
US population
343M
Denominator
Estimated living: 15K
Rarity: Uncommon
Gender: Male
Peak year: 1952
Average age: 53
Top Census group: White (65.7%)
Estimated bearers: 40K
Rarity: Uncommon
Census rank: #986
Per 100K: 11.65
Top ancestry: White (92.5%)
First name trend
Denis: popularity over time
Year-by-year SSA birth registrations for the first name Denis. The peak year was 1952 with 625 births. The average person named Denis today is 53 years old.
Babies born per year
Demographics
Ancestry and ethnicity for Denis
Self-reported race and ethnicity breakdown for people with the first name Denis, from the 2020 US Census Bureau first-name tables. The largest published group is White at 65.7%.
The bar chart below shows how people with the first name Denis described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the name Denis at the time of the Census. A first name does not determine a person's race or ethnicity.
- White65.7% · 18,218
- Hispanic or Latino25.6% · 7,100
- Black or African American5.2% · 1,451
- Asian and Pacific Islander2.1% · 572
- Two or more races1.2% · 344
- American Indian and Alaska Native0.2% · 60
Ethnicity
Ancestry of the Oconnell surname
Self-reported race and ethnicity breakdown for people with the surname Oconnell, from the 2020 US Census Bureau. The largest group is White at 92.5%.
The bar chart below shows how people with the surname Oconnell described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Oconnell at the time of the Census. A surname does not determine a person's race or ethnicity.
- White92.5% · 32,234
- Hispanic or Latino3.5% · 1,212
- Two or more races2.5% · 871
- Asian and Pacific Islander0.9% · 306
- Black or African American0.4% · 150
- American Indian and Alaska Native0.2% · 56
Methodology
How we calculated this
The first name Denis has a living-bearer frequency of 0.0045% of the US population, based on 15,473 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
Even though the Census Bureau now publishes first-name tables, we do not use that file as the main first-name input for this estimate. The latest first-name Census snapshot is from 2020, which makes it 6 years old today. Because Census first-name data is only released once every 10 years, SSA birth records plus CDC survival rates give a better current estimate of how many people are likely alive with the name Denis right now.
The surname Oconnell appears at a rate of 11.65 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0117%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 2 people with the full name Denis Oconnell. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Denis
Related
Other people with the surname Oconnell
FAQ
Denis Oconnell: questions and answers
How many people are named Denis Oconnell?
We estimate approximately 2 people in the United States share the full name Denis Oconnell. That works out to about 1 in 171,377,169 Americans. This is calculated by combining the first-name frequency (0.0045%) with the surname frequency (11.65 per 100K) against the current US population.
How rare is the name Denis Oconnell?
We classify Denis Oconnell as "Very Rare". About 1 in 171,377,169 Americans share this exact first and last name combination.
Is Denis a male or female name?
Denis is predominantly male. Out of 21,503 total SSA registrations, 96.0% were male and 4.0% were female. See the full Denis profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many Americans are named Denis Oconnell?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.